Yes, Watchmen is well worth watching. It’s one of the best TV series I’ve seen in a long time. Here’s a review: ‘Watchmen’ Review: Damon Lindelof’s Spectacular HBO Series Is Equal Parts Insightful and Exciting Since it’s an HBO series, perhaps it’ll eventually be available on channels other than Sky.
I have to say I didn't even bother to look as i kept thinking it was the movie on Sky until recently. I may delve into it given the positive review.
I’d recommend watching Watchmen in order, as the plot builds up carefully from episode to episode. The buildup meant I didn’t get hooked until episode 3, but now I’m hooked. It’s a terrific series.
Now TV. Either binge it during your 7 day trial or pay £9 for a month. It's no contract so you can just pay for a month whenever something good comes on Sky Atlantic, or any Sky channel or Comedy Central.